Carburetor



June 10 1930. M, sTElNHARDT ET AL 1,762,200

CARBURETOR I v Filed March 1ej1925 :s Sheets-Sheet 1 INVENTORS 61 r a zwBY 7 v ATTORNEYS June 10, 1930. $TE|NHARDT ET AL 1,7 2.2oo v CARBURET ORFiled March 16, 1925 5 Sheets-Sheet 2 BY y z ATTORNEYS IN ENTORS Fig.6

June 10, 1930. M. STEINHARDT Er AL 1,762,200

CARBURETOR 3 Sheets-Sheet 3 Filed March 16, 1925' m EN/TO s I I wm W 7%ATTORNEY S I Patented; June w, 1&86

PATENT r ce MAX STEINHARDT, or MUNICH, GERMANY, AND EMIL BAUER, orYonxnns,

NEW YORK I oannunnron I Application med March 16, 1925. Serial No.15,723,

This invention relates to an improved type of-c'arburetor.

i It is an object of the invention to provide -proved. carburetor whichwill efficiently atomize virtually all fuel particles so as'to furnish ahomogeneous mixture-in which the fuel is minutely subdivided in order to'obtain' a fuel mixtureby means of which an internal combustion motor orsimilar consuming element-mayjbe operated'with ut-' the lines 5 and inthe direction of the armost efficiency.

' -Another object is' that of furnishing a fuelmixing device which willoperate, and be under-the'control of 'an operator, in such amanner astoreduce fuel consumption to a minimum. i

Another object is that of providing an apparatus of the nature statedwhich when utilized'for example in association with an internalcombustionmotor, will facilitate the starting of-the same, aside fromthe fact that it-will permit-0f the operation of the motor.

being controlled with a great degree of nicety. Stillanother object isthat of providing a carburetorwhich will eificiently perform thepurposes for which it is intended, and

which willalso be economically and readily manufactured and assembled.

Other' objects of the invention will in part be obvious and will in partappear herein- ;5 after.

The invention accordingly comprises the features of construction,combinations of elements, and arrangement of parts, which will beexemplified in the constructions here '40 inafter set forth and thescope of the application of which will be indicated in the claims.

I For a fuller understanding of the nature and objects of the inventionreference should as behad to the following detailed description taken inconnection with the accompanying drawings, in which:

- Fig. 1 is-a side elevation ofone form of carburetor embodying theimproved, construction of the present invention.

Fig. 2 is a sectional View similar-to Fig. 1.

y F igl 3 is an enlarged sectional and partly fragmentaryview of thedevice shown in- Fig. 2.

- Fig. 4: is a fragmentary sectional view of a portion of the mechanismas illustrated in Fig. 3 .and showing'the' parts ina different position.A

Fig. 5 is a sectional planview taken along rows indicated in Fig.- 2.

Fig. 6 is a similar View taken along the lines 66 and-in the directionof the arrows alsoindicated in Fig. 2.

Fig. 7 is a sectional plan view taken along the lines 77 of Fig. 1 andFig. 8 illustrates one of the details of construction.

In these several views the invention has been illustrated in the form ofa carburetor particularly adapted for use in connection withinternalcombustion motors. Here numeral 10 indicates a main housing or casing ofthe carburetor which in the present instance has its lower end incommunication with an air intake casing 11 the flow through the latterbeing controllable, if desirable, by means of what is commonly termed achoke valve as at 12.

The mechanism by means of which the fuel anism afore referred to andthrough the case0 ing 13-may be controlled by means of a valve. In thepresent exemplification this valveincludes a body 15 which cooperateswith a seat 16 formed within-the casing 13. The

body of the valve is' carried by a stem 17 and the latter tends tomaintain this valve in seated condition incident to the provision of aspring 18. This spring cooperates with the stem and is in turn carriedwithin the socketed end of a rod 19, the latter passing through suitablepacking 20 disposed within a casing 21. The lower portion of this casingis formed with a screw thread and the base of the rod 19' is enlargedand screw threaded as at 22in order to cooperate with the threadaforementioned.

Thus, if this enlarged portion of the rod is turned as for example bymeans of a torque cable 23 it will be obvious that consequent'to thisturning a projection and retraction of the rod 19 will result, in turnresulting in a seating and unseating of the valve to permit or tointerrupt the flow of fluid through the easing 13.

Referring now in detail to the mechanism by means of which the fuel andair are mixed to produce an eflicient explosive mixture it will be notedthat a collar is interposed between the housings 10 and 11, this collarbeing illustrated in section in Figs. 3 and 5 and in plan in Fig. 8.With particular reference to the latter figure it will be observed thatthis member in the present instance includes nothing more than an outerring 24 which is concentrically disposed relative to the upper edge of atube 25, the parts being retained in assembled and spaced relationpreferably by means of a series of radial arms 26.

For the purpose of preventingan escape of the fuel as well as forpurposes more particularly hereinafter brought out a second tube 27 hasits upper end disposed within the tube 25 and this tube 27 is continuedin the form of a nozzle 28. The lower end of the tube projects beyondthe lower edge of the tube 25 and through the lower portion of thecasing 11 beyond which by means of a suitable union 29 it is.connectedwith the casing 13. At this point the fuel intake casing isformed with an opening intersecting its bore 30 and disposed within andextending beyond the ends of this opening is a sleeve 31, the boreof'which is in communication with the passage 30. As in Fig.2 the lowerend of the sleeve may be enlarged as in 32 and carry a packing nut 33 bymeans of a screw'threaded connection, this nut in turn having its innerface threaded to engage threads34 on the lower part of a spindle 35.This spindle adjacent the point of connection of the bore 30 and thesleeve bore is formed with a reduced portion 36 and a channel 37 isprovided in its outer face and has one ofits ends in communication withthls reduced portion, its opposite end being in communication with abore 38 extending at the upper end thereof.

' In order to control the flow of fluid from the outlet end of thecasing 10 a throttle valve which may be of conventional construction, asat 39, is rotatably positioned therein. This valve is controlled in thepresent exemplification by means of an arm '40 extending exteriorly ofthe casing and when this arm is ac-' tuated a follower will in thepresent instance be reciprocated within the casing 10 by vi-rtue of thefact that the valve 39 has one end of a link 41 connected to itsunderface, the opposite end of this link being connected with thefollower. This latter member. which has been shown in plan in Fig. 5 mayinclude a central body portion 42from which a series of arms radiate asat 43. These arms each carry at their outer ends a guide shoe 44 whichslidably en ages with the inner face of the casing 10. connecting rod issecured to the underface of this follower preferably by socketing andflanging the upper end of the rod as at 46 and forming the'underface ofthe follower body with a recess 47 of a size sufficient to slidablyaccommodate this upper end. A spring 48 is interposed between the baseof this recess and the base of thev socket so that the rod 45 isnormally pressed downwardly with respect to the follower although itsmovements are limited in the present instance due to the provision of alock ring 49 arranged adjacent the mouth of the.

recess and of a size suflicient to prevent the passage of the flange.

The lower end of the rod 45 extends within a Venturi member 50 disposedwithin the casing 10, and at a point somewhat above the central portionof the same is connected with a valve which controls to the greatestextent the flow of fluid through the Venturi. This socket and has one ofits ends bearing against the base of the same, its opposite end bearingagainst a disk 58 carried by the upper end of a valve stem 59 which inthe present instance extends into the collar 53 and the socketed lowerportion of the rod 45. The upper end of the nozzle extends into the bore60 formed within the collar 53, the body 51 and skirt 61 of the valve-The upper end of the nozzle 'is formed with an outlet opening 62 and avalve 63 carried by the stem 59 normally closes this opening. The upperend of the spindle 35 extends within the tube 27 and terminates adjacentthe upper end of this memi the stem 59.

. valve 63. i It is here to Finally, with reference to the constructiondepicted in the present instance it will be noted that the mouth of thetube 25 is flared as at 65 and that the skirt 61 is spaced from thisflared mouth as well as from the outer face of the nozzle 28, thelatter-being tapered towards its upper end so as to provide a space ofincreasingly cross sectional area between the inner face of the bore andits outer face.

In operating a device of this character the fuel intake line 14 isconnected with a suitable source of fuel supply, the upper end of thecasing is connected with a consuming element such as an internalcombustion motor, the air intake casing may be connected with a suitablemechanism providing a hot air intake and the torque cable 23 maybe-associated with a dash control. If it is desired to start the motorthe valve 15 is unseated permitting the flow of fuel into the sleeve 31channel 37 and bore 38 until it reaches a point at which its furtherfiow is sto ped by means of the he noted that by means of the presentconstruction it is unnecessary to .utilize afloat chamber. However,obviously,-if it were desired this element might be employed. If now theconsuming element (i. e. motor) is operated to cause a suction withinthe casing 10 this suction will be transmitted past the idling regulator66 and will 35 act through openings 67 which extend between the bore 60and the outer face of the collar 53 and air will thus be drawn throughthe casing 11 between the arms 26 and between the skirt 61 and flaringmouth of the tube 25 and thus into the bore 60. If now the throttlevalve 39 is slightly opened this opening will obviously result in apartial unseat-ing of the valves 63 and 64 and the fuel will rise withinthe bore of the spindle 35, overflow the upper end of the nozzle 28 andbegin to pour downwardly over the outer face of this nozzle. In suchflowing it will be met by a film of air rushing upwards through the bore60 and thus a mixture will be produced ideally adapted for the functionsof starting and idling.

As the consuming element becomes warm the amount of opening of the valve15 may be reduced, it being observed, that if the suction issufiiciently heavy the compensating feature provided by spring 18 willserve to extend automatically the degree of opening of this valvewithout further attention by the operator. By partial closing of thevalve however the richness of the mixture may be regulated. When now thethrottle valve 39 is opened to a greater extent air will be free to passbetween the Venturi face and the edges of the valve body 51 although itwill continue to pass through the bore 60. As a consequence it will befound that the fuel emerging from the nozzle 28 will be initially brokenup by the air passing upwardly lower faces of the valve body'51 anenhanced suction will result at the outer ends of the openings 67 sothat the comparatively rich fuel mixture emerging from these, openingswill be instantly disseminated throughout the entire column of airrising through the casing 10. In this connection it will be observedthat incident to the tapered exterior contour the amount of air whichcomes into contact with the fuel as it emerges from the nozzle 28, andconsequently the mixture will always be initially and properly brokenup. Furthermore, due to the fact that the degree of inclithrough thisbore and due to the fact that the air is'diverted as in Fig. 4 by theinclined nation of the underface of the valve body 51 is greater thanthe degree of inclination, of the venturi 50 as is shown in Fig. 4, therate of travel of the air will be accelerated, and

as a consequence, the degree of the suction.

will be increased.

The fuel supply, however, is not proportional to the increase in suctionat all points in the travel of the valve member, since it is seen thatwhen the valve member 51 has moved vto its extreme unseated position,the valve body 64 operates in conjunction with the opening 62 tothrottle down the fuel supply as the valve member 52 is further openedto admit the air supply. Thus it is seen that as the speed of the engineor other consu1n-.

ing element approaches a certain valve, the fuel fed to the mixture isautomatically cut down, so that a lean mixture results which is bothdesirable and efficient from the standpoint of engine performance athigh speeds.

By virtue of the provision of spring 57, the valve '39 has yieldablemotion with respect to the nozzle and is then seen to be respon sive tovarying conditions in the demand for combustible mixture.

Also due to the provision of the spring 48 the mechanism of'thecarburetor will adapt itself to varying conditions of suction and willautomatically, within limits, adjust the position of the valve stem 59.Finally with reference to the-pocket provided by the flaring mouth 65 ofthe tube25 it will be observed that unvaporized fuel particles will notescape into the air intake of the carburetor but will collect in thispocket and gradually be absorbed by surface contact with the air whichrushes into the bore 60.

Since certain changes may be made in the above construction anddifferent embodiments of the invention could be made without departingfrom the scope thereof, it is intended that all matter contained in theabove de- 'scription or shown in the accompanying drawing shall beinterpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended tocover all of the generic and specific features of the invention hereindescribed, and all statements of the scope of the invention which as amatter of language might be said to fall therebetween.

Having described our invention, What we claim as new and desire tosecure by Letters Patent is:

1. In a carburetor, the combination comprising a casing having an airinlet chamber and a communicating mixing chamber, a nozzle having aconnection adapted for communication with a fuel supply, said nozzlebeing provided with two valve seats, one being disposed at its outletorifice and a second on the interior thereof, a valve member havingportions adapted to seat simultaneously on each of said seatsrespectively the portion adapted to seat on said second seat beingarranged to restrict said orifice when the valve member is moved toextreme unseated position, and a second valve member disposed to controldirectly the communication between said chambers and adapted to beoperated by suction, said second valve member being operativelyconnected to said first named valve member and ar ranged to operate thesame for supplying fuel proportionately to opening communication betweensaidchambers at low suction rates.

prising a casing having an air inlet chamber and a communicating mixingchamber, a nozzle having a connection adapted for communication with afuel supply, said nozzle being provided with two valve seats, onebebetween saidchambers and adapted to be operated bysuction, said secondvalve mem ber having'a skirted portion cooperating with said nozzle forproviding an initial mixture of air and fuel and having a flexibleconnection to said first named valve member.

3. In a carburetor, the combination comprising a casing having an airinlet chamber and a communicating mixing chamber, a nozzle. having aconnection adapted for communication with a fuel supply, said nozzlebeing provided with two valve seats, one being disposed at its outletorifice and a second on the interior thereof, a valve member 2. In acarburetor,the combination com having portions adapted to seatsimultaneously on eachof said seats respectively the portion adapted toseat on said second seat being arranged to restrict said orifice whenthe valve member is movedto extreme unseated position, and a secondvalve member operatively connected to the first valve member anddisposed to control directly the communication between said chambers andadapted to be operated by suction, said second valve member beingarranged to be actuated by the pressure differential in said chambersand having a skirted portion extending about said nozzle toward said airinlet chamber and openings providing restricted communication betweensaid skirted portionand said mixing chamber whereby an initial supply ofair may enter from said inlet chamber to said mixing chamber.

4.- In a carburetor, the combination comprising a casing having an airinlet chamber and a communicating mixing chamber, a nozzle havingaconnection adapted for communication witha fuel supply, said nozzlebeing provided with two valve seats, one being disposed at its outletorifice and a second on the interior thereof, a valve member havingportions adapted to seat simultaneously on each of said seatsrespectively the portion adapted to seat on said second seat beingarranged to restrict said orifice "when the valve member is moved toextreme unseated position, and a second valve member disposed to controldirectly the communication between said chambers and adapted to beoperated by suction, said second valve member being provided with ayieldable connection to said first named valve member and disposed to beactuated by suction and to open proportionately the communicationbetween said chambers.

5. In a carburetor, the combination comprising a casing having an airinlet chamber and a communicating mixing chamber, a

nozzle having a connection adapted for communication with a fuel supply,said nozzlebeing provided with two'valve seats, one being disposed atits outlet orifice and a second on the interior thereof, a valve memberhaving portions adapted tos'eat simultaneously on each of said seatsrespectively the portion adapted to seat on said second seat beingarranged to restrict said orifice when the valve'member is moved toextreme unseated position, and a second valve member disposed to controldirectly the communication between said chambers and ada ted to beoperated by suction, said secon valve member having a general conicalform and provided with an extended skirted portion toward the apex ofthe cone and recessed to ,fit over said nozzle,, said recess having restricted communication at one end with said mixing chamber andcommunicating at its free end with said air inlet chamber whereby secondon the interior. thereof, a valve memher having portions adapted to seatsimultaneously on each. of said seats respectively the portion adaptedto seat on saidsecond seat being arranged to restrict saidorifice whenthe valve member is moved to extreme unseated position, and a secondvalve member disposed to control directly the communi z operated bysuction, said second valve being yieldingly connected to said firstnamed valve member, and a throttle valve disposed at the exit of saidmixing chamber and having operative connections with said first andsecond named valve members, said throttle having a recess to permit thepassage of a starting and idling mixture when in closed position.

In testimony whereofI'afix my signature.

r MAX STEINHARDT. In testimony whereof I ailix my signature. EMIL BAUER.

cation between said chambers, said second valve member having a generalconical form and provided with an extended skirted portion toward theapex ofthe cone and recessed to fit over said nozzle, said recess havinga portion arranged to house a spring and a coupling member adapted foryieldingly connecting said firstand second valve members in operativerelation.

7. In a carburetor, the combination comprising a casing having an airinlet chamber and a communicating mixing chamber, a nozzle having aconnection adapted for communication with a fuel supply, said noz'zlebeing provided with two valve seats, one being disposed at its outletorifice and a second on the interior thereof, a valve member havingportions adapted to seat simultaneously on each of said seatsrespectively the portion adapted to seat on said second seat beingarranged to restrict said orifice when the valve member is moved toextreme unseated position, and a second valve member disposed-to controldirectly the communication between said chambers and adapted to beoperated by suction, said second valve being yieldingly connected tosaid first named valve member, and a throttle valve disposed at the exitof said mixing chamber and havingoperative connections with said firstan second named valve members. 8. In a carburetor, the combinationcomprising a casing having an air inlet chamber and a communicatingmixing chamber, a nozzle having a connection adapted for com municationwith a fuel supply, said nozzle being provided with two valve seats, onebeing disposed at its outlet orifice and a second on the interiorthereof, a valve member having portions adapted to seat simul--taneously on each of said seats respectively the portion adapted to seaton said second seat being arranged to restrict said orifice when thevalve member is moved to extreme unseated position, a second valvemember disposed to control directly the communication between saidchambers and adapt-ed to be

